/*
 * Copyright (C) 2020 Graylog, Inc.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the Server Side Public License, version 1,
 * as published by MongoDB, Inc.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * Server Side Public License for more details.
 *
 * You should have received a copy of the Server Side Public License
 * along with this program. If not, see
 * <http://www.mongodb.com/licensing/server-side-public-license>.
 */
package org.graylog.plugins.views.storage.migration.state.actions;

import com.fasterxml.jackson.annotation.JsonProperty;

public record TrafficSnapshot(@JsonProperty("start_bytes") long startInputBytes,
                              @JsonProperty("start_ts") long startTimestamp) {

    public static final String TRAFFIC_SNAPSHOT = "traffic_snapshot";
    public static final String ESTIMATED_TRAFFIC_PER_MINUTE = "estimated_traffic";

    public TrafficSnapshot(long startInputBytes) {
        this(startInputBytes, System.currentTimeMillis());
    }

    public long calculateEstimatedTrafficPerMinute(long currentInputBytes) {
        return calculateEstimatedTrafficPerMinute(currentInputBytes, System.currentTimeMillis());
    }

    long calculateEstimatedTrafficPerMinute(long currentInputBytes, long endTimestamp) {
        double elapsedTimeMin = (endTimestamp - startTimestamp) / (double) (1000 * 60);
        long inputTraffic = currentInputBytes - startInputBytes;
        return (long) (inputTraffic / elapsedTimeMin);
    }
}
